Welcome to hive.
Here is an article to get you started on hive https://leopedia.io/hive/
If you get some free time, feel free to explore the hive guide tutorial. It's a bit lengthy but worth watching. https://thehiveguide.com/
Feel free to ask around or even DM for any questions. :) Welcome again.
& Why Hive?
because it is a community fork of steem, and we are trying to spread good content. Community is good helping and developing hive. There isn't a sole leader/CEO. & System is sustainable if you provide value. :)